These round little gauges are a waste of money, and dashboard
space. To me, they're basically "show-off" gauges. Serves no
purpose whatsoever, unless, your ride is a true sportscar like the
WRX STi, EVO, a Porche, or a Ferrari.
Otherwise, you might as well remove the dial-plate inside, seal it
up and convert it into a little aquarium to keep little SeaMonkeys
in your car.